Fix warnings in InMemoryAppPreferencesStore

[bmarty]

No description provided.

[github-actions]

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 80.06%. Comparing base (fcaf6a5) to head (87c3db4).
Report is 3 commits behind head on develop.

Files with missing lines	Patch %	Lines
...es/preferences/test/InMemoryAppPreferencesStore.kt	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #4523      +/-   ##
===========================================
- Coverage    80.06%   80.06%   -0.01%     
===========================================
  Files         2083     2083              
  Lines        54928    54926       -2     
  Branches      6851     6851              
===========================================
- Hits         43980    43978       -2     
  Misses        8590     8590              
  Partials      2358     2358              

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